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ITS#8062 fix rebalance

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(Probably fixes the ITS, definitely fixes a bug) when collapsing
the root page, fixups of other cursors was incomplete.
This commit is contained in:
Howard Chu 2015-04-15 23:20:55 +01:00
parent dd58f3dde4
commit 97c7b6151e
1 changed files with 6 additions and 2 deletions
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8
libraries/liblmdb/mdb.c
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@ -7717,12 +7717,12 @@ mdb_rebalance(MDB_cursor *mc)
m3 = m2;
if (m3 == mc || m3->mc_snum < mc->mc_snum) continue;
if (m3->mc_pg[0] == mp) {
m3->mc_snum--;
m3->mc_top--;
for (i=0; i<m3->mc_snum; i++) {
m3->mc_pg[i] = m3->mc_pg[i+1];
m3->mc_ki[i] = m3->mc_ki[i+1];
}
m3->mc_snum--;
m3->mc_top--;
}
}
}
@ -7792,7 +7792,11 @@ mdb_rebalance(MDB_cursor *mc)
} else {
oldki += NUMKEYS(mn.mc_pg[mn.mc_top]);
mn.mc_ki[mn.mc_top] += mc->mc_ki[mn.mc_top] + 1;
/* We want mdb_rebalance to find mn when doing fixups */
mn.mc_next = mc->mc_txn->mt_cursors[mc->mc_dbi];
mc->mc_txn->mt_cursors[mc->mc_dbi] = &mn;
rc = mdb_page_merge(mc, &mn);
mc->mc_txn->mt_cursors[mc->mc_dbi] = mn.mc_next;
mdb_cursor_copy(&mn, mc);
}
mc->mc_flags &= ~C_EOF;